Journal
ANALYTICAL LETTERS
Volume 51, Issue 13, Pages 2039-2049Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/00032719.2017.1396605
Keywords
Gas sensing; heat treating; luminescence; Nickel-doped lithium iron phosphate thin film; optical properties; xylene detection
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Funding
- Xinjiang University [209-61371, 21765021]
- National Natural Science Foundation of China [209-61371, 21765021]
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The influence of heat-treatment temperature on the optical properties (refractive index, transmittance, and attenuation) and gas sensitivities of nickel-doped lithium iron phosphate (LiFe0.99Ni0.01PO4) thin films were discussed. LiFe0.99Ni0.01PO4 was synthesized in one step using hydrothermal methods and fixed to tin-diffused glass as a sensing film by spin-coating before calcination at different temperatures. The obtained thin films were characterized by refractive index, thickness, attenuation, and porosity, as well as gas sensing performances for benzene, toluene, and xylene. The experimental results indicated that the LiFe0.99Ni0.01PO4 thin films dried at 450 degrees C displayed higher refractive indices, good transparency, and less attenuation; thus, the resulting sensor of a LiFe0.99Ni0.01PO4 thin film/tin-diffused optical wave-guide exhibited a greater response to xylene in the concentration range of 0.1-1000ppm.
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